Superheater



E. A. (EkUGHEGAN SUPEHHEATER.

APPucMwN FILED APR. 4. I918.

1,309,025. Patented July 8, lb!

EDWARD A. GEOGHEGAN, OF SAN FRANCISCO, CALIFORNIA.

SUPERHEATER.

Specification of Letters Patent.

Patented July 8, 1919.

Application filed April 4, 1918. Serial No. 226,640.

To all whom it may concern:

Be it known that I, EDWARD A. Gnoonnonn, a citizen of the United States, residing at San Franciscm'in cisco and State of California, have invented certain new and useful Im rovements in Super-heaters, and I do here y declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked there on, forming part of this specification.

My invention relates to steam superheating apparatus, and the 'dbjects thereof are to so construct and arrange the several parts of the apparatus as to prevent stratification of steam as it passesthroughthe apparatus, so that those particles of steam which contact with the inner surface of the several tubular passages from which they absorb heat will be caused to intermingle with those particles of steam which have not come into contact therewith, so that instead of there being. continuous annular strata of steam, the outer of which are dry, and the inner of which carry .entrainedmoisture, passing through the apparatus, such strata are broken up and the particles of steam have imparted to them a whirling or smoke ring movement as they travel through the apparatus, thus insuring the contacting of every particle of steam with the inner surface of the superheating tubes, so that all possibility of a central core of steam heavily loaded with moisture will be eliminated. The features of my invention are hereinafter more particularly described and pointed out, and are illustrated inthe accompanying drawings in which:

Figure 1, is a vertical central section of a portion "of a steam boiler with my improved superheating apparatus installed therein.

Fig. 2, is a lan view of my improved apparatus, havin portions thereof broken away, removed rom the boiler.

Fig. 3, is a front end view thereof.

In these drawings A indicates a steam boiler having fire tubes A adapted to receive return-bend superheater tubes B. I have shown a two stage superheater, that is, one with a series of pairs of return-bend tubes B. The open ends of these returnbend tubes B are connected with small the county of San F ranconnected by means of return bend tubes C.

D indicates a transverse tubular intake header, which is connected with the small headers C by means of return bend tubes E which enter the upper chambers 0 thereof, while the lower chambers c of said headers G are connected with a transverse tubular header F by means of curved tubes F.

The several headers (3,1) and F, and curved tubes E, C and F, are preferably located in the smoke-box G of the boiler A, where they are subject to heat, so that all of the tubular passages of the apparatus act upon the steam during its passage therethrough.

In operation steam is introduced into the intake header 1) from where it passes through the curved tubes E to the upper chamber 0 of the headers C, and thence through theupper bank of return-beml tubes 15 to the chambers r." in the headers (J; thence through the bank of return-bend tubes C to the chambers in the headers (l: thence through the next bank of returnbcnd tubes 13 to the lower chambers c of the headers C. from whence the steam passes through the bank of curved tubes F to the outlet header F. During the flow of steam through the curved tubes E, C and F, by reason of the inner and outer radii of the tubular passages therethrough. the columns of stean nssume a whirling motion, the particles of st m1 rotating upon traveling axes, so that al stratification, or parallel lines are broken up, and the some is true in regard to the looped ends of the tubes B.

l-l aving thus fully shown and described my invention so as to enable others to ,utilize the same, what I claim as new and desire to secure by Letters Patent is z- In an apparatus of the class described, a series of vertical headers, the interiors of which are divided into separate chambers a return-bend superheater tube connecting t e first chamber with the second chamber, a 

